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Finding the Fourth Proportional to 247,239.78, 370,736.97 and 78,738.14

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Solution

The fourth proportional to 247,239.78, 370,736.97 and 78,738.14 is: 118,068.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,239.78 : 370,736.97 = 78,738.14 : x
  2. Step 2: Convert to fraction form
    247,239.78/370,736.97 = 78,738.14/x
  3. Step 3: Cross multiply
    247,239.78x = 370,736.97 × 78,738.14
  4. Step 4: Simplify right side
    247,239.78x = 29,191,139,447.04
  5. Step 5: Solve for x
    x = 29,191,139,447.04/247,239.78
  6. Step 6: Final answer
    x = 118,068.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.